1 Department of Emergency Medicine, Faculty of Medicine & Dentistry, College of Health Sciences, University of Alberta, Edmonton, Alberta, Canada [email protected].
2 School of Public Health, College of Health Science, University of Alberta.
3 Department of Emergency Medicine, Faculty of Medicine & Dentistry, College of Health Sciences, University of Alberta, Edmonton, Alberta, Canada.
4 SPOR SUPPORT Unit, Alberta Health Services (AHS), Edmonton.
5 Department of Medicine, Division of Neurology, Faculty of Medicine & Dentistry, College of Health Sciences, University of Alberta.